621545914 has 16 divisors (see below), whose sum is σ = 1017469440. Its totient is φ = 282411360.

The previous prime is 621545863. The next prime is 621545921. The reversal of 621545914 is 419545126.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88102 + ... + 94894.

It is an arithmetic number, because the mean of its divisors is an integer number (63591840).

Almost surely, 2^621545914 is an apocalyptic number.

621545914 is a deficient number, since it is larger than the sum of its proper divisors (395923526).

621545914 is a wasteful number, since it uses less digits than its factorization.

621545914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10965.

The product of its digits is 43200, while the sum is 37.

The square root of 621545914 is about 24930.8225696626. The cubic root of 621545914 is about 853.4100218283.

It can be divided in two parts, 621 and 545914, that added together give a triangular number (546535 = T₁₀₄₅).

The spelling of 621545914 in words is "six hundred twenty-one million, five hundred forty-five thousand, nine hundred fourteen".